I am struggling to get an Epson \"ESC/POS\" printer to print barcodes (Using Delphi) and want to test if the printer is not faulty. Do you know where I can find a program to
Get the Microsoft POS For .Net 1.11, it's got an SDK that includes a sample application that performs all the basic operations on POS hardware. I'm using it all the time to test that cash drawers work ok for example.
There's also a source code included (in .Net), so you can see how they do it.